Other common bolt patterns are 5×4.75 and 5×5. Just a heads up, you’ll need a calculator for this. Here’s the cheat sheet. The first concept one must be familiar with to understand bolt patterns is called BCD, for Bolt Circle Diameter.If you lay one of your wheels on the ground and draw a circle that passes through the center of each of the lug holes, that is the Bolt Circle, and it only remains to measure the diameter of said circle. Figuring out the right bolt pattern is rather simple, but it is extremely important that the measurements are accurate. This means that should you ask for a 1/2-inch x 12 x 4-inch Grade 2 Hex Bolt Head with a 1-inch thread, the request is universally understood by bolt manufacturers. Bolt circles are measured in both inches and millimeters, therefore you may hear a bolt pattern referred to as both (i.e. Best how to measure bolt pattern selection available. 6 Bolt with a 10" Center Hole. The bolt pattern spacing can also be measured with a regular tape measure. Measure the bolt patterns of the rim. It is critical to know the BCD of your crankset when you are selecting a new chainring for your bike. So a 4x100 bolt pattern means that there are 4 lugs, with a diameter of 100 millimetres (3.9 in). The accurate measurement is depicted here and can only be measured with a special tool called a bolt pattern gauge or by using a complex geometric equation. Bolt measurements can be calculated in millimeters or inches, but bolt measurements specified in inches are international. Below we illustrate how to measure … A 4 bolt wheel with 100mm between opposite bolt holes would be written as 4/100. Measure from the middle of one stud to the outside of the second stud (skipping a stud). The majority of boat trailers on the road have a 4, 5 or 6 lug pattern. When measuring the distance between the bolt holes on any wheel, it is important to keep in mind that that patterns with an even number bolt holes (4, 6, or 8 holes) are a lot easier to measure than patterns with an odd number bolt holes (3, 5 or 7 bolt holes). The bolt pattern consists of two numbers and looks like this (5x4.50) - the first number in this example "5" indicates how many bolt … The diagram indicates the proper measuring methods. Click for larger. In your situation it will probably end up as 10 7/16" or so which is the 10.5" pattern As all 6 bolt holes are evenly spaced out in a circular pattern, simply select two opposite bolt holes. Trailer wheel hub patterns can be defined by the number of bolts or lugs per wheel and the diameter of the circle that the bolts are arranged on. Bolt patterns can be 4-, 5-, 6-, or 8-lug holes. Measure Bolt Hole Center to Bolt Hole Center. When searching for aftermarket wheels, you'll find that the wheel bolt patterns are listed, for you to determine which wheels will fit your vehicle. The bolt circle is the circle determined by the positions of the bolts; the center of every bolt lies on the circumference of the bolt circle. To measure your bolt pattern, pick the illustration below that represents your wheel stud pattern and measure as described below each illustration. You can estimate the measurement unless accurately measured using a bolt pattern gauge. The bolt pattern is merely the number of bolts on the wheel. Stay Connected. Trailer wheel bolt patterns can be defined by the number of bolts or lugs per wheel and the diameter of the circle that the bolts are arranged on. Using the illustration below as guide, measuring backspacing is a simple two-step process. The 4 X 156 Bolt Pattern or Pitch Circle Diameter (PCD) is made up of the stud count (4) and the bolt circle measurement (156), the notional circle determined by the center position of the studs.. How To Measure 4 Lug Bolt Patterns. Below are a few diagrams to help you measure your bolt pattern with a normal ruler or measuring tape. The diagrams below indicate the proper measuring methods. Wheel Bolt Pattern is the measured diameter of an imaginary circle formed by the centers of the wheel studs or bolt holes. Measuring for 4, 6, and 8-Lug Wheels. Bolt Circle Diameter . 5-lug bolt patterns are a little trickier to measure since the bolt holes aren’t directly across from each other. We cover how to measure odd hole patterns … The distance that you are measuring is the diameter of a … Bolt patterns may contain 4-, 5-, 6-, or 8-lug holes or studs. See Also: Wheel Bolt Pattern Cross Reference ~ Look-up a vehicle bolt pattern by Make/Model or browse all vehicles with a particular bolt pattern. lug pattern / bolt circle / pcd is defined by the number of… 4 Bolt Rim. To measure 5 lug pattern wheels, hold the end of the ruler or tape measure to the center of one bolt. If the numbers match, that does not necessarily mean the bolt pattern will fit. 3 Bolt Hole with a 9 3/8" Center Hole. On bicycle chainrings this dimension is usually measured in millimeters. 4-lug bolt patterns are measured in a straight line from center to center of the two bolt holes directly across from each other. You have 4 lug (bolt) rims on your machine, but I will show 3 and 5 bolt rims also. A bolt circle of 4x100 would indicate a 4-lug pattern on a circle with a diameter of 100mm. Measuring the wheel bolt pattern on your vehicle is necessary if you are in the market for aftermarket wheels. 6-lug wheels are measured like 4-lug wheels. On some cranks, like 4 bolt cranks, it’s fairly easy to measure, but for road and cyclocross with 5 bolts, it’s not so easy. Now, measure the center of the two bolt holes you selected. Four (4) Bolt. This is how to measure your tire bolt pattern based on your specific lug count. MEASURE A BOLT PATTERN. Backspacing is the distance between the back of the rim flange and the mounting pad (where the hub attaches). If you don’t have the template handy, you measure from the center of any hole, skip a hole in either direction and then measure to the outside edge of that hole. The closest you can get is to measure from the center of one lug to the outer edge of the lug farthest away. Bolt patterns are written with 2 measurements: the number of bolts and the diameter from center to center. A 5-lug pattern is where things can get confusing. 4 X 156 Bolt Pattern Measurement and Specifications. Online Catalog. If you have 5 or 7 studs, you will have to take an extra step to determine the bolt pattern. To get 5 and 7 lug bolt patterns it's not so simple. Bolt Circle Diameter (BCD) is the diameter of the circle that goes through the center of all of the bolts on your chainring. You can estimate the measurement by using a straight line from the backside of one hole to the center of the third bolt hole. Skipping A Bolt Hole In Between. Now that you know how to measure lug bolt patterns, here … For vehicles that use 4, 6, or 8 lugs, the simplest way to find its inner diameter is to measure the distance between holes directly across from one another. Bolt pattern or bolt circle is the diameter of an imaginary circle formed by the centers of the wheel lugs. Lug patterns are measured in either Inches or Millimeters. Lowest price guaranteed. It’s the measurement (diameter) of an imaginary circle passing through the centers of all the bolts in a round pattern – like chainring bolts that hold the rings to the crank. A bolt circle of 4x100 would indicate a 4-lug pattern on a circle with a diameter of 100mm. Measure from the center of one bolt hole (or stud if it is still one the bike) across the axle hole to the center of the bolt hole on the other side. If you need the 4, 6 or 9 Lug page look here How to measure 4, 6 or 8 lug wheel bolt pattern If you want a more accurate approach check out the Wheel Bolt Circle Calculators This is where the rim sizing starts to get a little tricky. How to Measure Backspacing. say the number of lug holes/studs on measurement, such as : 5 on 4.5 or 6 on 135mm. 5-bolt patterns can be more difficult to measure since the bolt holes are not directly across from each other. The number you see will be the actual measurement of the bolt pattern. The correct terminology for referencing bolt patterns is to . You measure from the BACK of one lug (skip to next lug as shown) and to the CENTER of that lug. 5x114.3 mm is also referred to as 5x4.5). Interchangeable Wheel / Bolt Pattern Chart for Cars, Trucks, Vans, SUVs, Motorhomes, RVs, ATVs, UTVs and Trailers . There are lots of tools made for measuring bolt patterns on OEM Rims, but unless you need to do it every day you may not want to go buy another tool to clutter your garage! A bolt circle of 5x114.3 mm would indicate a 5 lug pattern on a circle with a diameter of 114.3mm (or 4.5"). A "bolt pattern" is essentially the diameter of the "bolt circle". bolt pattern the arrangement of the bolt holes on a wheel. Common bolt patterns are 4, 5, 6, or 8 lug holes. First, measure the center to center distance between two studs that are across the hub from each other. Bolt patterns in 4- 6- and 8-lug can be measured by going from the center of a stud to the center of the stud directly across from it. Once you’ve selected them you should see that there is a 2 bolt hole gap on both sides. Thousands of how to measure bolt pattern reviews, same day shipping. Measure Trailer Wheel Bolt Pattern. If there are 5 studs, multiply the measurement by 1.05 to get the bolt pattern diameter. Ea This means they are a 5-lug pattern with a diameter from lug-to-lug of 100 millimeters. To get a 4, 6 or 8 lug bolt pattern use a device to measure from the center of one lug to the center of the lug directly accross from it. Extend the ruler directly across from the bolt to the space across from the bolt, located in the center of two bolts or lugs, to determine the measurement. 3 Bolt Hole with a 10" Center Hole. Measure center to center of two holes directly across from each other. Some wheels have more than one bolt pattern on the same wheel to accomodate multiple fitments. Learn how to determine the bolt pattern on your trailer. If you were to draw a circle through all of the lug holes in your wheel, the diameter of that circle, is your bolt pattern. Determining the bolt pattern is rather easy, but it is very important that accurate measurements are taken. The diagram (upper, left) indicates the proper measuring methods. So if you see 4 1/2 inches, you have a 5 on 4 1/2 ( also 5×4.5 and 5×114.3) bolt pattern. In order to find the right wheel for your trailer, you will need to know the bolt pattern. The first thing you want to compare is how many lug nuts or studs are on your vehicle and then how many are on the rim. 6-lug wheels are measured like 4-lug wheels. Bolt pattern measurements are typically taken in millimeters. That will give you the bolt mounting diameter. You can also determine your 5 bolt pattern by measuring the distance between the center of one bolt hole, to the center of the bolt hole next to it. That should get you your bolt pattern measurement. That measurement is your bolt pattern diameter. A 5-lug bolt pattern is a little more difficult to measure, but you can easily do that by following the diagram below. Therefore, take a few minutes to measure the wheel bolt pattern so that you purchase the correct wheels for your car. You measure 6-lug go-kart wheels the same way you would measure 4-lug wheels. Basically, the bolt pattern of a wheel is the diameter of the circle that the bolt holes are drilled on. Measure the distance from the outside of one stud to the inside of the opposite stud on the conerter. You need this number in millimeters (mm). Measuring bolt patterns is a critical part of ordering wheels. As the bolts will be evenly spaced, the number determines the bolt pattern. 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